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Problems:
Calculate the pH of a buffer solution:
Containing 0.015 M acetic acid and 0.035 M sodium acetate.
The same solution as in part a) after enough HC l has been added to establish a Cl-concentration of 0.001 M.
Where: KA=1.8*10-5
For the carbonate system in pure water, what species dominates at the typical pH encountered in natural water sources?
A sample of water collected in the field had a pH of 6.8. By the time it was analyzed in the lab, the pH had decreased to 6.0. Give apossible explanation.
For a water sample with a bicarbonate ion concentration of 50 mg/L and a CO2 content of 30 mg/L:
Find the pH &
Find the pH if CO2 is reduced by aeration to only 3 mg/L.
Assignment NOTE: 1. All work is to be neat and legible. 2. Units are to be included in all calculations. 3. Late submissions will lose 25% per day. 4. Cover sheets containing the following information are to be used: - Your name. - The date of submission. - The course title and number. - The assignment number. 5. Place your responses only on the“right hand pages”of the submitted assignment. 6. You are responsible for the proper binding of your submissions.
Question- There is three different possible isomers of a difluoroethene, C2H2F2. Draw Lewis structures for each, including all valence electrons, predict the polarity] of each and label each as either a structural or stereoisomer-if stereoisomer, ..
Fermium-253 has a half life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half lives. How much time will elapse for this sample to be considered gone?
calculate the molality m of a 7.25 kg sample of a solution of the solute ethanol dissolved in the solvent water if the
Predict the product(s) and write a balanced equation for the following redox reaction: (include state os matter) pentane(C5H12) + oxygen >
write a balanced half-reaction for the reduction of sulfate ion so42- to the sulfite ion so32- in acidic solution. how
A solution is labeled "0.464 M NaClO." What are the following in the solution? Express your concentrations to three significant figures even when only two are valid. Express your pH to two places past the decimal point. Note that the value of Ka f..
Calculate the molarity, Molarity of iron (III) chloride solution
Consider a colloidal suspension(like a solution) of very small particles in a solvent. We may think of this as an ideal gas of particles in the external field due to gravity.
Draw the conj acid of this base and use its structure to explain why it is so basic (resonance forms may help). The pKa of the conj acid is about 26. What is the pKb of the free base?
based on the ionization energies of the alkali metals which alkalimetal would you expect to undergo the least
Calcium hydroxide, Ca(OH)2, dissolves in water to the extent of 1.04 g/L. What is the value of Ksp for Ca(OH)2
Compare the numbers you have just calculated with the vapour pressures of water at these temperatures. Can you suggest a reason why the two sets of numbers are so different?
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